Looks like she wanted to spill the beans only on her confession time.
The episode cannot be spending 15 full minutes on a staged fake confession, Anjana seems to have her actual fact of doing an accidental murder of Yash and Pooja. So she went from Mumbai to Massorrie follwing Pooja confronting her and when things disnt work she did the accidental murder of them and came back to Mumbai and returned to Masoorie for the corpse ?
She has some physiological imbalance and implusive nature.
And Arjun is aplogizing to Zoya on her behalf as if it is ok to make that mistake 😲